Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62d40dd1fb0f547…

MALICIOUS

PDF

35.1 KB Created: 2021-07-10 00:11:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e4a3c9923c10b03582bb2a89706937c4 SHA-1: c1d00b27e2ee8fbb49f68d4218f96692b94bd1d1 SHA-256: f62d40dd1fb0f547f71cc2390ad6d901a23b6c2f24a543cb3a6ad7f1489410ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, specifically promoting 'game hacks' and 'free currency' lures. The document body and embedded links strongly suggest a phishing or scam attempt designed to lead users to further malicious content. The presence of multiple PDF files hosted on mbbs.hr indicates a chain of malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/coin-master-rewards-app-game-hack In PDF document text
    • http://mbbs.hr/files/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-website_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-roblox-mobile-app_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/robux-gratis-sin-hacks-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/make-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://mbbs.hr/files/hacks-piano-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-robux-hack-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-hack-roblox-accounts-passwords-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-on-roblox-on-xbox-one_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000325e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x325E 22996 bytes
SHA-256: a62d6086a2722f50f9e9b1bbc6b207b4ef3c9abd33b13e99d56e3492db8557c6
font_01_sfnt_off000065f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F4 18348 bytes
SHA-256: 45424ac4f3ff45d139caa860f388b1f701ed118c37a64d99de4ada9b4bfd65a4

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